.lu-btn-3d {
    width: 100px;
    height: 40px;
    background: linear-gradient(to bottom, #4eb5e5 0%, #389ed5 100%);
    border: none;
    border-radius: 5px;
    position: relative;
    border-bottom: 5px solid #2b8bc6;
    color: #fbfbfb;
    font-weight: 600;
    font-family: 'Open Sans', sans-serif;
    text-shadow: 1px 1px 1px rgba(0, 0, 0, .4);
    font-size: 15px;
    text-align: center;
    box-shadow: 0px 3px 0px rgba(0, 0, 0, .2);
    cursor: pointer;
}

.lu-btn-3d:active {
    box-shadow: 0px 2px 0px rgba(0, 0, 0, .2);
    top: 1px;
}

/* .lu-a-3d {
    background: linear-gradient(to bottom, #f00 0%, #ff9999 100%);
    border-bottom: 5px solid #ff3300;
    display: block;
    width: 100px;
    line-height: 40px;

} */